The MK1 series, developed by Primary Weapons Systems, is a significant product improvement for the M4/M16-type carbines and rifles. Utilizing our proven long stroke piston system, the MK1 series greatly reduces fouling in the action of the rifle making it as reliable as the AK47 that it was designed after.
Significant product improvements have been made over both the direct impingement operating system and previous offerings of piston-driven operating systems. Our product improvements have addressed reliability and performance issues as well as reduced carrier tilt, cam pin wear and carrier bounce.
An innovative hand guard system utilizes a proprietary non-free float system that allows the end user or unit armorer to replace individual rails as needed without removing the barrel, barrel nut or even other rails. This system allows the user to attach numerous picatinny rail mounted devices such as sights, lights, and laser aiming devices.
The PWS proprietary operating system utilizes an operating rod that is attached to the carrier and a floating head piston that is attached to the operating rod. With no unnecessary gas adjustments and only one moving assembly, this is the most rugged, simple and versatile piston operating system available.
Specifications
Caliber 5.56 NATO / .223
Weight 4 lbs 4 oz (1.92 kg)
Overall Length 21.4' (54 cm)
Barrel Length 12.5' (31.75 cm)
Barrel Specs SS, button rifled, 1:8 twist
Muzzle Velocity 2866 ft/sec (XM193)
Muzzle Energy 1002 ft/lbs
Features
Stainless Steel, Button Rifled, 1:8 Twist
BCMGUNFIGHTER Charging Handle
Mil Spec Upper Receiver
PWS Enhanced Bolt Carrier Group
Micro-slicked Internals
MAGPUL XT Rail panels
TRIAD flash suppressor
